JP4877079B2 - Rolling bearing device - Google Patents

Description

  The present invention relates to a rolling bearing device, and more particularly to a rolling bearing device suitable for use in supporting a roll for transporting paper in a sheet-fed printing press.

  Conventionally, some rolling bearing devices include an inner ring, an outer ring having an outer peripheral conical surface, and a sleeve having an inner peripheral conical surface that matches the outer peripheral conical surface of the outer ring.

In this rolling bearing device, the outer diameter of the substantially cylindrical outer peripheral surface of the sleeve is adjusted by adjusting the axial position of the sleeve with respect to the outer ring. In this rolling bearing device, a gap between the outer peripheral surface of the sleeve and the inner peripheral cylindrical surface of the housing fitted on the outer peripheral surface is predetermined by adjusting the outer diameter of the substantially cylindrical outer peripheral surface of the sleeve. It is designed to adjust to the gap.
JP 2006-64177 A (FIG. 1)

  The present inventor has found that the following problems exist in the conventional rolling bearing device.

  That is, in the conventional rolling bearing device, the position of the sleeve in the axial direction with respect to the outer ring is adjusted so that the portion of the inner peripheral conical surface that contacts the outer peripheral conical surface of the outer ring is increased, and the outer peripheral surface of the sleeve is adjusted. When the diameter is increased, the distal end portion on the large-diameter side of the inner peripheral conical surface of the sleeve is deformed outward in the radial direction by the vertical drag from the outer peripheral conical surface of the outer ring. For this reason, the fitting gap between the outer peripheral surface of the sleeve and the inner peripheral cylindrical surface of the housing may not be precisely adjusted to a predetermined fitting gap.

  In addition, since the distal end portion on the large diameter side of the inner peripheral conical surface of the sleeve is deformed radially outward, the inner peripheral conical surface of the sleeve does not uniformly contact the outer peripheral conical surface of the outer ring. In some cases, the outer ring may come into contact with the outer peripheral conical surface and the rigidity of the rolling bearing device may be reduced.

  Accordingly, an object of the present invention is to accurately adjust the fitting gap between the outer peripheral surface of the sleeve and the inner peripheral surface of the housing to a predetermined fitting gap and expanding the outer peripheral surface of the sleeve. Is to provide a rolling bearing device in which a decrease in rigidity is unlikely to occur.

In order to solve the above problems, the rolling bearing device of the present invention is
A first bearing ring having a raceway surface on the inner periphery and a tapered surface on the outer periphery;
A second race ring having a raceway surface on the outer periphery;
A rolling element disposed between the raceway surface of the first raceway and the raceway surface of the second raceway;
It has an inner peripheral contact surface that contacts the tapered surface of the first track ring, and has an outer peripheral surface that can be expanded and contracted by moving in the axial direction with respect to the first track ring. With a sleeve,
The sleeve has a base portion and a fitting portion connected to the base portion in the axial direction,
The base has an outer peripheral cylindrical surface and an inner peripheral conical surface,
In the axial cross-section of the sleeve, the fitting portion has an outer peripheral surface at the distal end portion of the fitting portion that is radially inner than an extension surface of the outer cylindrical surface in a state where the sleeve is not assembled. And the inner peripheral surface of the front end of the fitting portion is positioned more radially inward than the extended surface of the inner peripheral conical surface.

  According to the present invention, in the axial cross section of the sleeve, the outer peripheral surface of the front end portion of the fitting portion is more radially inward than the extended surface of the outer peripheral cylindrical surface when the sleeve is not assembled. And the axial direction of the sleeve with respect to the first race ring because the inner peripheral surface of the front end portion of the fitting portion is positioned radially inward from the extended surface of the inner peripheral conical surface. In the state where the outer peripheral surface of the sleeve is moved to a position where the diameter of the sleeve is expanded and the distal end portion of the fitting portion is deformed outward in the radial direction, the distal end of the fitting portion is compared with the conventional case. The outer peripheral surface of the portion can be brought close to the extended surface of the outer peripheral cylindrical surface, and the inner peripheral surface of the tip portion of the fitting portion can be brought closer to the extended surface of the inner peripheral conical surface.

  Therefore, when the sleeve is assembled, the position of the outer peripheral surface of the front end portion of the fitting portion can be specified more accurately than in the past, and the position of the inner peripheral surface of the front end portion of the fitting portion Compared to the conventional case, the fitting gap between the outer peripheral surface of the sleeve and the inner peripheral cylindrical surface of the housing can be precisely determined by a predetermined fitting gap. Can be adjusted.

  Further, according to the present invention, the inner peripheral surface of the sleeve is uniformly brought into contact with the outer peripheral surface of the first race ring in a state where the distal end portion of the fitting portion is deformed radially outward. be able to. That is, in a state where the tip end portion of the fitting portion is deformed radially outward, it is possible to prevent the inner peripheral surface of the sleeve and the outer peripheral surface of the first bearing ring from being in contact with each other. It can suppress that rigidity falls.

The rolling bearing device of the present invention is
A first bearing ring having a raceway surface on the inner periphery;
A second race ring having a raceway surface on the outer periphery;
A rolling element disposed between the raceway surface of the first raceway and the raceway surface of the second raceway;
A first sleeve having an inner peripheral surface abutting on the outer peripheral surface of the first raceway ring and a tapered surface on the outer periphery;
A second sleeve having an inner circumferential abutting surface that abuts against the tapered surface of the first sleeve and having an outer circumferential surface capable of being expanded and contracted by moving in the axial direction relative to the first sleeve; With a sleeve,
The second sleeve has a base and a fitting portion connected to the base in the axial direction.
The base has an outer peripheral cylindrical surface and an inner peripheral conical surface,
In the axial section of the second sleeve, the fitting portion is configured such that the outer peripheral surface of the distal end portion of the fitting portion is more than the extended surface of the outer peripheral cylindrical surface in a state where the second sleeve is not assembled. In addition to being located radially inward, the inner peripheral surface of the distal end portion of the fitting portion is positioned more radially inward than the extended surface of the inner peripheral conical surface.

  According to the present invention, in the axial section of the second sleeve, the outer peripheral surface of the front end portion of the fitting portion is more radial than the extended surface of the outer peripheral cylindrical surface when the second sleeve is not assembled. And the inner peripheral surface of the distal end portion of the fitting portion is positioned radially inward from the extended surface of the inner peripheral conical surface. The axial position of the two sleeves moves to a position where the outer peripheral surface of the second sleeve is expanded, and the tip of the fitting part is deformed outward in the radial direction. The outer peripheral surface of the distal end portion can be brought closer to the extended surface of the outer peripheral cylindrical surface as compared with the conventional one, and the inner peripheral surface of the distal end portion of the fitting portion is compared with the conventional inner peripheral surface as compared with the conventional one. Can be close to the conical surface extension.

  Therefore, the position of the outer peripheral surface of the front end portion of the fitting portion can be more accurately specified as compared with the conventional case, and the position of the inner peripheral surface of the front end portion of the fitting portion is compared with the conventional case. Therefore, the fitting gap between the outer peripheral surface of the second sleeve and the inner peripheral cylindrical surface of the housing can be precisely adjusted to a predetermined fitting gap as compared with the conventional case.

  Further, according to the present invention, the inner peripheral surface of the second sleeve is brought into contact with the outer peripheral surface of the first sleeve evenly in a state where the distal end portion of the fitting portion is deformed outward in the radial direction. can do. That is, in a state where the front end portion of the fitting portion is deformed radially outward, it is possible to prevent the inner peripheral surface of the second sleeve and the outer peripheral surface of the first sleeve from coming into contact with each other. It can suppress that the rigidity of falls.

In one embodiment,
The first sleeve has a base portion and a fitting portion connected to the base portion in the axial direction,
The base of the first sleeve has an outer peripheral conical surface and an inner peripheral cylindrical surface,
The fitting portion of the first sleeve has an outer peripheral surface of a tip portion of the fitting portion of the first sleeve in a state where the first sleeve is not assembled in an axial section of the first sleeve. The inner peripheral surface of the distal end portion of the fitting portion of the first sleeve is positioned radially outward from the extended surface of the outer peripheral conical surface of the first sleeve. It is located radially outward from the extended surface of the circumferential cylindrical surface.

  The outer peripheral surface and the inner peripheral surface of the distal end portion of the fitting portion of the first sleeve are deformed inward in the radial direction by the vertical drag of the inner peripheral surface of the second sleeve.

  According to the above embodiment, the outer peripheral surface of the distal end portion of the fitting portion of the first sleeve in the state where the distal end portion of the fitting portion of the first sleeve is deformed inward in the radial direction as compared with the conventional case. The first sleeve can be brought close to the extended surface of the outer peripheral conical surface, and the inner peripheral surface of the front end of the fitting portion of the first sleeve can be brought closer to the extended surface of the inner peripheral cylindrical surface of the first sleeve. it can. Therefore, the fitting gap with the inner peripheral cylindrical surface of the housing can be adjusted more precisely to a predetermined fitting gap.

  Further, according to the above embodiment, the outer peripheral surface of the first sleeve is uniformly applied to the inner peripheral surface of the second sleeve in a state where the distal end portion of the fitting portion of the first sleeve is deformed radially inward. Can be touched. That is, in the state where the tip end of the fitting portion of the first sleeve is deformed inward in the radial direction, the outer peripheral surface of the first sleeve and the inner peripheral surface of the second sleeve can be suppressed from hitting each other, It can suppress that the rigidity of a rolling bearing device falls.

  According to the rolling bearing device of the present invention, the fitting gap between the outer circumferential surface of the sleeve and the inner circumferential cylindrical surface of the housing fitted on the outer circumferential surface can be precisely adjusted to a predetermined fitting gap. Further, in a state where the outer peripheral surface of the sleeve is expanded, it is possible to suppress the inner peripheral surface of the sleeve from hitting the outer peripheral surface of a member that is radially opposed to the inner peripheral surface, thereby suppressing a decrease in rigidity. .

  Hereinafter, the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a cross-sectional view of a rolling bearing device according to an embodiment of the present invention.

  In FIG. 1, the first sleeve 12 and the second sleeve 13 described below are assembled together. Moreover, in FIG. 1, illustration is abbreviate | omitted about the detailed structure of the rolling bearing apparatus.

  This rolling bearing device rotatably supports a paper transport roll of a sheet-fed printing press.

  This rolling bearing device includes a first outer ring 1 as a first race ring, a second outer ring 2 as a first race ring, an intermediate ring 3 as a second race ring, a first inner ring 4, a second inner ring 5, and rolling elements. A plurality of first tapered rollers 7, a plurality of second tapered rollers 8 as rolling elements, a plurality of third tapered rollers 9, a plurality of fourth tapered rollers 10, a first sleeve 12, a second sleeve 13, and An annular spacer 15 is provided.

  The first outer ring 1 and the second outer ring 2 are arranged so as to face each other in the axial direction with a spacer 15 interposed therebetween. The first outer ring 1 has a cylindrical outer peripheral surface 71 on the outer peripheral side and a conical track surface 17 on the inner peripheral side. The second outer ring 2 has a cylindrical outer peripheral surface 72 on the outer peripheral side, and a conical track surface 18 on the inner peripheral side. The spacer 15 has a cylindrical outer peripheral surface 73.

  The outer diameter of the outer peripheral surface 71 of the first outer ring 1, the outer diameter of the outer peripheral surface 72 of the second outer ring 2, and the outer diameter of the outer peripheral surface 73 of the spacer 15 are substantially the same. The inner diameter of the conical raceway surface 17 increases toward the second outer ring 2, while the inner diameter of the conical raceway surface 18 increases toward the first outer ring 1.

  The intermediate wheel 3 has a first conical track surface 21 and a second conical track surface 22 on the outer peripheral side, and a third conical track surface 24 and a fourth conical track surface 25 on the inner peripheral side. .

  The first conical track surface 21 is formed at one end of the outer peripheral surface of the intermediate wheel 3 in the axial direction, while the second conical track surface 22 is formed at the other end of the outer peripheral surface of the intermediate wheel 3 in the axial direction. Is formed. The third conical track surface 24 is formed at one end of the inner peripheral surface of the intermediate ring 3 in the axial direction, while the fourth conical track surface 25 is the other end of the inner peripheral surface of the intermediate ring 3 in the axial direction. It is formed in the part.

  The outer diameter of the first conical track surface 21 increases toward the other end portion in the axial direction, while the outer diameter of the second conical track surface 22 increases toward the one end portion in the axial direction. It is getting bigger. Further, the inner diameter of the third conical track surface 24 decreases as it goes to the other end portion in the axial direction, while the inner diameter of the fourth conical track surface 25 decreases as it goes to the one end portion in the axial direction. It has become.

  The first inner ring 4 has a conical raceway surface 31 on the outer peripheral side, while the second inner ring 5 has a conical raceway surface 32 on the outer peripheral side. The first inner ring 4 is located at an axial distance from the second inner ring 5. The outer diameter of the conical raceway surface 31 of the first inner ring 4 becomes smaller toward the second inner ring 5 side, while the outer diameter of the conical raceway surface 32 of the second inner ring 5 goes to the first inner ring 4 side. The size is getting smaller.

  The plurality of first tapered rollers 7 are spaced apart from each other in the circumferential direction while being held by a cage between the first conical raceway surface 17 of the outer ring 1 and the first conical raceway surface 21 of the intermediate ring 3. The plurality of second tapered rollers 8 are held by a cage between the second conical raceway surface 18 of the outer ring 1 and the second conical raceway surface 22 of the intermediate ring 3. Are arranged at intervals in the circumferential direction. Further, the plurality of third tapered rollers 9 are mutually held in the circumferential direction while being held by a cage between the third conical raceway surface 24 of the intermediate ring 3 and the conical raceway surface 31 of the first inner ring 4. The plurality of fourth tapered rollers 10 arranged at intervals are held by a cage between the fourth conical raceway surface 25 of the intermediate ring 3 and the conical raceway surface 32 of the second inner ring 5. Thus, they are arranged at intervals in the circumferential direction.

  The first sleeve 12 includes a first inner peripheral cylindrical surface 40, a second inner peripheral cylindrical surface 41, an outer peripheral tapered surface 43, and an outer peripheral cylindrical surface 44. The first inner peripheral cylindrical surface 40 extends in the axial direction from one axial end of the inner peripheral surface. The second inner peripheral cylindrical surface 41 is connected to the second inner peripheral cylindrical surface 40 via an end surface 46 that extends in the radial direction. The inner diameter of the second inner peripheral cylindrical surface 41 is smaller than the inner diameter of the first inner peripheral cylindrical surface 40. The first cylindrical surface 40 is fitted and fixed to the outer peripheral cylindrical surface 71 of the first outer ring 1, the outer peripheral cylindrical surface 73 of the spacer 15, and the outer peripheral cylindrical surface 72 of the second outer ring 2. The end surface 46 of the first sleeve 12 is in contact with the end surface of the second outer ring 2 opposite to the axial spacer 15 side.

  The outer peripheral tapered surface 43 is present at a predetermined distance from one end in the axial direction of the outer peripheral surface of the first sleeve 12 in the axial direction. The outer diameter of the outer peripheral tapered surface 43 increases as the distance from the one end in the axial direction of the outer peripheral surface of the first sleeve 12 increases.

  The second sleeve 13 has an inner peripheral tapered surface 50 as an inner peripheral contact surface, an inner peripheral cylindrical surface 52, and a substantially cylindrical outer peripheral surface 51. The inner peripheral cylindrical surface 52 is connected to the end on the small diameter side of the inner peripheral tapered surface 50 via an axial end surface 54 that extends in the radial direction. The inner diameter of the inner peripheral cylindrical surface 52 is smaller than the minimum inner diameter of the inner peripheral tapered surface 50. The end surface 54 has a portion that overlaps the axially outer end surface of the first outer ring 1 in the axial direction.

  The inner peripheral tapered surface 50 of the second sleeve 13 has a shape that matches the outer peripheral tapered surface 43 of the first sleeve 12. At least a part of the outer peripheral tapered surface 43 of the first sleeve 12 is in contact with at least a part of the inner peripheral tapered surface 50 of the second sleeve 13. As will be described later, the second sleeve 13 is movable in the axial direction. Therefore, the portion of the inner peripheral tapered surface 50 of the second sleeve 13 that overlaps the outer peripheral tapered surface 43 of the first sleeve 12 in the radial direction can be changed.

  The housing 14 has an inner peripheral cylindrical surface 63. The inner peripheral cylindrical surface 63 of the housing 14 is opposed to the outer peripheral surface 51 of the second sleeve 13 in the radial direction.

  FIG. 2 is an enlarged view of a portion of the rolling bearing device that is located radially outward from the outer rings 1 and 2. More specifically, FIG. 2 shows one example of the rolling bearing device in which the fitting clearance between the inner peripheral cylindrical surface 63 of the housing 14 and the outer peripheral surface 51 of the second sleeve 13 is adjusted to a predetermined clearance. It is sectional drawing which shows a part.

  As shown in FIG. 2, the second sleeve 13 has a through hole 91. The through hole 91 extends in the axial direction and penetrates the second sleeve 13 in the axial direction. The through hole 91 opens in the end surface 54 of the second sleeve 13. The first outer ring 1 has a screw hole 92. The screw hole 92 extends in the axial direction. The screw hole 92 opens on the outer end surface of the first outer ring 1 in the axial direction. The opening on the first outer ring 1 side of the through hole 91 of the second sleeve 13 overlaps the opening on the end surface 54 side of the second sleeve 13 of the screw hole 92 of the first outer ring 1 in the axial direction. Further, the rolling bearing device has a bolt 105, and the shaft portion of the bolt 105 passes through the through hole 91 and is screwed into the screw hole 92. The length of the shaft portion of the bolt is slightly shorter than the length obtained by adding the length of the through hole 91 and the length of the screw hole 92. The shaft portion passes through the through hole 91, and a part of the shaft portion is fitted in the screw hole 92.

  By adjusting the tightening amount of the bolt 105, the distance between the end surface 54 of the second sleeve 13 and the outer end surface in the axial direction of the first outer ring 1 is adjusted. The axial length of the radially overlapping portion of the outer peripheral tapered surface 43 and the inner peripheral tapered surface 50 of the second sleeve 13 is adjusted.

  In this way, the outer peripheral surface 51 of the second sleeve 13 is appropriately expanded or contracted to adjust the outer diameter of the outer peripheral surface 51 of the second sleeve 13, and the inner peripheral cylindrical surface 63 of the housing 14; The fitting gap with the outer peripheral surface 51 of the second sleeve 13 is adjusted.

  FIG. 3 is a schematic cross-sectional view in the axial direction of the second sleeve 13 in a single state that is not assembled to the first sleeve 12.

  Unlike FIG. 1 and FIG. 2, in FIG. 3 and the following FIG. 4, the shape of the first sleeve 12 or the second sleeve 13 is exaggerated for easy understanding. Therefore, the shape of the second sleeve 13 does not exactly match in FIGS. 3, 1, and 2, and the shape of the first sleeve 12 does not exactly match in FIGS. 4, 1, and 2. .

  As shown in FIG. 3, the second sleeve 13 includes a base portion 200 and a fitting portion 201. The fitting portion 201 is smoothly connected to the base portion 200. The base portion 200 is a portion that overlaps the root portion of the inner circumferential tapered surface 50 in the radial direction. The base 200 has an outer peripheral cylindrical surface 207 and an inner peripheral conical surface 208. On the other hand, the fitting portion 201 has an outer peripheral surface 203 having a curved sectional shape and an inner peripheral surface 204 having a curved sectional shape.

  As shown in FIG. 3, the outer peripheral surface 203 of the distal end portion of the fitting portion 201 is positioned radially inward from the extended surface 213 of the outer peripheral cylindrical surface 207 of the base portion 200 in the axial cross section. The inner peripheral surface 204 at the distal end portion of the portion 201 is located radially inward from the extended surface 214 of the inner peripheral conical surface 208 of the base portion 200.

  FIG. 4 is a schematic cross-sectional view in the axial direction of the first sleeve 12 in a single state that is not assembled to the second sleeve 13.

  As shown in FIG. 4, the first sleeve 12 includes a base portion 300 and a fitting portion 301. The fitting portion 301 is smoothly connected to the base portion 300. The base portion 300 is a portion that overlaps the root portion of the outer peripheral tapered surface 43 in the radial direction. The base 300 has an outer peripheral conical surface 307 and an inner peripheral cylindrical surface 308. On the other hand, the fitting portion 301 has an outer peripheral surface 303 having a curved cross-sectional shape and an inner peripheral surface 304 having a curved cross-sectional shape.

  As shown in FIG. 4, in the axial cross section, the outer peripheral surface 303 of the distal end portion of the fitting portion 301 is located radially outward from the extended surface of the outer peripheral conical surface 307 of the base portion 300, and the fitting portion The inner peripheral surface 304 at the tip of 301 is located radially outward from the extended surface of the inner peripheral cylindrical surface 308 of the base 300.

  The inclination angle of the bus line with respect to the central axis of the outer peripheral conical surface 307 of the base portion 300 of the first sleeve 12 is substantially the same as the inclination angle of the bus line with respect to the central axis of the inner peripheral conical surface 208 of the base portion 200 of the second sleeve 13.

  In this embodiment, in consideration of the radial deformation of the two sleeves 12 and 13 during assembly in advance, the two sleeves 12 and 13 are not assembled so as to cancel out the deformation of the two sleeves 12 and 13. , 13 are determined. Of course, the shapes of the two sleeves may be determined so as not to completely cancel the deformation.

  FIG. 5 is a sectional view in the axial direction of the second sleeve 413 of the comparative example in a state where it is not assembled, and FIG. 6 is a sectional view in the axial direction of the first sleeve 412 of the comparative example in a state where it is not assembled. is there. FIG. 7 is a sectional view in the axial direction showing a state in which the first sleeve 413 of the comparative example and the second sleeve 412 of the comparative example are assembled.

  As shown in FIG. 5, the second sleeve 413 of the comparative example has an outer peripheral cylindrical surface 460 and an inner peripheral conical surface 470 when not assembled. As shown in FIG. 6, the first sleeve 412 of the comparative example has an outer peripheral conical surface 480 and an inner peripheral cylindrical surface 490 when not assembled. The inclination angle of the bus line with respect to the central axis of the inner peripheral conical surface 470 and the inclination angle of the bus line with respect to the central axis of the outer peripheral conical surface 480 are set to be the same.

  As shown in FIG. 7, the inventor fits the second sleeve 413 when the outer peripheral conical surface 480 of the first sleeve 412 is fitted and brought into contact with the inner peripheral conical surface 470 of the second sleeve 413. The tip of the portion is deformed radially outward as indicated by the dotted line in FIG. 5, while the tip of the fitting portion of the first sleeve 412 is radially inward as indicated by the dotted line in FIG. It was confirmed to be deformed.

  Further, due to the deformation of the sleeves 412 and 413, the outer peripheral surface 500 (see FIG. 7) of the second sleeve 412 and the inner peripheral surface (not shown) of the housing that is radially opposed to the outer peripheral surface 500. It has become difficult to precisely adjust the fitting gap to the predetermined fitting gap. Further, the inner peripheral conical surface 470 of the second sleeve 413 does not uniformly contact the outer peripheral conical surface 480 of the first sleeve 412, but comes into contact with the outer peripheral conical surface 480 of the first sleeve 412, and the rolling bearing device. The rigidity decreased.

  According to the rolling bearing device of the above embodiment, the outer peripheral surface 207 of the distal end portion of the fitting portion 201 of the second sleeve 13 in a state where the second sleeve 13 is not assembled in the axial section of the second sleeve 13. Is positioned radially inward of the extended surface 213 of the outer peripheral cylindrical surface 207 of the second sleeve 13, and the inner peripheral surface 204 of the distal end portion of the fitting portion 201 of the second sleeve 13 is the second sleeve 13. Since the inner circumferential conical surface 208 is positioned radially inward of the extended surface 214, the axial position of the second sleeve 13 relative to the first sleeve 12 is such that the outer peripheral surface of the second sleeve 13 has a larger diameter. In the state where the distal end portion of the fitting portion 201 of the second sleeve 13 is deformed radially outward, the outer peripheral surface of the distal end portion of the fitting portion 201 of the second sleeve 13 is moved to the first position. 2 sleeve 13 The inner peripheral surface of the distal end portion of the fitting portion 201 of the second sleeve 13 can be brought closer to the extended surface 214 of the inner peripheral conical surface 208 of the second sleeve 13. be able to. Therefore, the fitting gap between the outer circumferential surface 203 of the second sleeve 13 and the inner circumferential cylindrical surface 63 of the housing 14 can be precisely adjusted to a predetermined fitting gap.

  Further, according to the rolling bearing device of the above-described embodiment, the inner peripheral surface of the fitting portion 201 of the second sleeve 13 in a state where the distal end portion of the fitting portion 203 of the second sleeve 13 is deformed outward in the radial direction. Can be uniformly brought into contact with the outer peripheral tapered surface 43 of the first sleeve 12. That is, the inner peripheral tapered surface 50 of the second sleeve 13 and the outer peripheral tapered surface 43 of the first sleeve 12 are in one piece in a state where the distal end portion of the fitting portion 201 of the second sleeve 13 is deformed outward in the radial direction. It can suppress hitting and it can suppress that the rigidity of a rolling bearing apparatus falls.

  Further, according to the rolling bearing device of the above embodiment, in the state where the distal end portion of the fitting portion 301 of the first sleeve 12 is deformed inward in the radial direction, the distal end portion of the fitting portion 301 of the first sleeve 12 is deformed. The outer peripheral surface 303 can be brought close to the extended surface of the outer peripheral conical surface 307 of the first sleeve 12, and the inner peripheral surface 304 of the distal end portion of the fitting portion 301 of the first sleeve 12 is connected to the inner surface of the first sleeve 12. It can be brought close to the extended surface of the circumferential cylindrical surface 308. Therefore, the fitting gap between the outer circumferential surface 51 of the second sleeve 13 and the inner circumferential cylindrical surface 63 of the housing 14 can be adjusted more precisely to a predetermined fitting gap.

  Further, according to the rolling bearing device of the above-described embodiment, the outer peripheral taper surface 43 of the first sleeve 12 is made to be in the second state in a state where the distal end portion of the fitting portion 301 of the first sleeve 12 is deformed inward in the radial direction. The sleeve 13 can be made to uniformly contact the inner circumferential tapered surface 50. That is, the outer peripheral taper surface 43 of the first sleeve 12 and the inner peripheral taper surface 50 of the second sleeve 13 are in a state where the distal end portion of the fitting portion 301 of the first sleeve 12 is deformed inward in the radial direction. It can suppress hitting and it can suppress that the rigidity of a rolling bearing apparatus falls.

  In the rolling bearing device according to the above embodiment, the outer rings 1 and 2, the intermediate ring 3, and the inner rings 4 and 5 are provided. However, in the present invention, there is no intermediate ring, and the race ring is the outer ring and Only the inner ring may be used. Further, as in the rolling bearing device of the above embodiment, a plurality of outer rings 1 and 2 having one raceway surface may be arranged at intervals in the axial direction, and the inner peripheral surface of the integral outer ring may be axially arranged. A plurality of raceway surfaces may be formed at intervals. Further, as in the rolling bearing device of the above-described embodiment, a plurality of inner rings 4 and 5 having one raceway surface may be arranged with an interval in the axial direction, and spaced apart in the axial direction on the outer peripheral surface of the integral inner ring. A plurality of raceway surfaces may be formed. Further, the raceway surface may be arranged in a double row in the axial direction or may be a single row in the axial direction.

  In the rolling bearing device of the above embodiment, the rolling element is a tapered roller. However, in this invention, the rolling element may be a rolling element other than a tapered roller, such as a cylindrical roller, a spherical roller, or a ball. .

  Further, in the rolling bearing device of the above embodiment, in the axial sectional view of the second sleeve 13, the outer peripheral surface of the distal end portion of the fitting portion 201 of the second sleeve 13 in a state where the second sleeve 13 is not assembled. Is positioned radially inward of the extended surface 213 of the outer peripheral cylindrical surface 207 of the second sleeve 13, and the inner peripheral surface of the distal end portion of the fitting portion 201 of the second sleeve 13 is positioned on the second sleeve 13. The inner circumferential conical surface 208 was positioned radially inward from the extended surface 214. Further, in the sectional view in the axial direction of the first sleeve 12, the outer peripheral surface of the distal end portion of the fitting portion 301 of the first sleeve 12 is the outer peripheral cone of the first sleeve 12 in a state where the first sleeve 12 is not assembled. The inner peripheral surface of the front end portion of the fitting portion 301 of the first sleeve 12 is positioned more outward than the extended surface of the inner peripheral cylindrical surface 308 of the first sleeve 12. It was located radially outward.

  However, according to the present invention, in the axial sectional view of the second sleeve, the outer peripheral surface of the distal end portion of the fitting portion of the second sleeve is connected to the outer periphery of the base portion of the second sleeve in a state where the second sleeve is not assembled. The inner peripheral surface of the distal end portion of the fitting portion of the second sleeve is positioned more radially than the extended surface of the inner peripheral conical surface of the base portion of the second sleeve. While the first sleeve is not assembled in the axial sectional view of the first sleeve, the outer peripheral surface of the front end of the fitting portion of the first sleeve is positioned on the base of the first sleeve. The inner peripheral surface of the distal end portion of the fitting portion of the first sleeve may coincide with the extended surface of the inner peripheral cylindrical surface of the base portion of the first sleeve.

  Further, in the rolling bearing device of the above embodiment, the first sleeve 12 having the cylindrical inner peripheral surface 41 that contacts the cylindrical outer peripheral surfaces 71 and 72 of the outer rings 1 and 2 and the outer peripheral tapered surface 43 of the first sleeve 12 are in contact. A second sleeve 13 having an inner circumferential tapered surface 50, and the second sleeve 13 is moved in the axial direction with respect to the second sleeve 12 to increase the outer diameter of the outer circumferential surface 51 of the second sleeve 12 and The diameter was reduced.

  However, in the rolling bearing device according to the present invention, at least a part of the outer peripheral surface of the outer ring is formed into a conical shape, and the outer peripheral surface of the sleeve having a conical inner peripheral surface abutting on the outer peripheral surface of the outer ring is used as the outer ring. On the other hand, the diameter may be increased and decreased by moving in the axial direction. Thus, in the above embodiment, the sleeve corresponding to the first sleeve 12 may be omitted. The shape of the sleeve corresponding to the remaining second sleeve 13 may be the shape of the second sleeve of the above embodiment.

  In the previous two modified examples, only the sleeve having the outer peripheral surface fitted to the inner peripheral surface of the housing has the shape of the second sleeve 13 of the above-described embodiment. In these modified examples, it is preferable to determine the shape of the sleeve in the non-assembled state so as to cancel out the deformation in consideration of the outward deformation in the radial direction of the sleeve during the assembly.

  Also in the previous two modified examples, the deformation in the two sleeves 12 and 13 is canceled in consideration of the above-described embodiment, that is, the radial deformation of the two sleeves 12 and 13 during assembly. As in the embodiment for determining the shapes of the two sleeves 12 and 13 in the unassembled state, the fitting gap between the outer peripheral surface of the sleeve and the inner cylindrical surface of the housing is precisely adjusted to a predetermined fitting gap. In addition, in the state where the outer peripheral surface of the sleeve is expanded, it is possible to suppress the inner peripheral surface of the sleeve from hitting the outer peripheral surface of the member that is radially opposed to the inner peripheral surface, thereby reducing the rigidity. Can be suppressed.

It is sectional drawing of the rolling bearing apparatus of one Embodiment of this invention. It is an enlarged view of the part located in the outside of a diameter direction rather than the outer ring in the above-mentioned rolling bearing device. It is a schematic cross section of the axial direction of the 2nd sleeve in the single state which is not assembled | attached to the 1st sleeve. FIG. 6 is a schematic cross-sectional view in the axial direction of the first sleeve 12 in a single state that is not assembled to the second sleeve 13. It is sectional drawing of the axial direction of the 2nd sleeve of the comparative example in the state which has not assembled | attached. It is sectional drawing of the axial direction of the 1st sleeve of the comparative example in the state which has not assembled | attached. It is sectional drawing of the axial direction which shows the state which assembled | attached the 1st sleeve of the said comparative example, and the 2nd sleeve of the said comparative example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 1st outer ring 2 2nd outer ring 3 Intermediate ring 4 1st inner ring 5 2nd inner ring 7 1st tapered roller 8 2nd tapered roller 9 3rd tapered roller 10 4th tapered roller 12 1st sleeve 13 2nd sleeve 14 Housing 43 Peripheral taper surface 50 Inner peripheral taper surface 200,300 Base 201, 301 Fitting portion 207 Outer cylindrical surface 208 Inner peripheral conical surface 307 Outer peripheral conical surface 308 Inner peripheral cylindrical surface 213, 214 Extension surface

Claims (3)

A first bearing ring having a raceway surface on the inner periphery and a tapered surface on the outer periphery;
A second race ring having a raceway surface on the outer periphery;
A rolling element disposed between the raceway surface of the first raceway and the raceway surface of the second raceway;
It has an inner peripheral contact surface that contacts the tapered surface of the first track ring, and has an outer peripheral surface that can be expanded and contracted by moving in the axial direction with respect to the first track ring. With a sleeve,
The sleeve has a base portion and a fitting portion connected to the base portion in the axial direction,
The base has an outer peripheral cylindrical surface and an inner peripheral conical surface,
In the axial cross-section of the sleeve, the fitting portion has an outer peripheral surface at the distal end portion of the fitting portion that is radially inner than an extension surface of the outer cylindrical surface in a state where the sleeve is not assembled. The rolling bearing device is characterized in that the inner peripheral surface of the distal end portion of the fitting portion is positioned radially inward from the extended surface of the inner peripheral conical surface. A first bearing ring having a raceway surface on the inner periphery;
A second race ring having a raceway surface on the outer periphery;
A rolling element disposed between the raceway surface of the first raceway and the raceway surface of the second raceway;
A first sleeve having an inner peripheral surface abutting on the outer peripheral surface of the first raceway ring and a tapered surface on the outer periphery;
A second sleeve having an inner circumferential abutting surface that abuts against the tapered surface of the first sleeve and having an outer circumferential surface capable of being expanded and contracted by moving in the axial direction relative to the first sleeve; With a sleeve,
The second sleeve has a base and a fitting portion connected to the base in the axial direction.
The base has an outer peripheral cylindrical surface and an inner peripheral conical surface,
In the axial section of the second sleeve, the fitting portion is configured such that the outer peripheral surface of the distal end portion of the fitting portion is more than the extended surface of the outer peripheral cylindrical surface in a state where the second sleeve is not assembled. A rolling bearing device, wherein the rolling bearing device is located inward in the radial direction, and an inner peripheral surface of a tip portion of the fitting portion is positioned inward in a radial direction with respect to an extended surface of the inner peripheral conical surface. In the rolling bearing device according to claim 2,
The first sleeve has a base portion and a fitting portion connected to the base portion in the axial direction,
The base of the first sleeve has an outer peripheral conical surface and an inner peripheral cylindrical surface,
The fitting portion of the first sleeve has an outer peripheral surface of a tip portion of the fitting portion of the first sleeve in a state where the first sleeve is not assembled in an axial section of the first sleeve. The inner peripheral surface of the distal end portion of the fitting portion of the first sleeve is positioned radially outward from the extended surface of the outer peripheral conical surface of the first sleeve. A rolling bearing device, wherein the rolling bearing device is located radially outward from an extended surface of a circumferential cylindrical surface.

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